Merge changes from topic "db/deps" into integration

* changes:
feat(compiler-rt): update compiler-rt source files
fix(deps): add missing aeabi_memcpy.S
feat(zlib): update zlib source files
d

Merge changes from topic "db/deps" into integration

* changes:
feat(compiler-rt): update compiler-rt source files
fix(deps): add missing aeabi_memcpy.S
feat(zlib): update zlib source files
docs(changelog): add zlib and compiler-rt scope
feat(libfdt): upgrade libfdt source files
docs(prerequisites): upgrade to Mbed TLS 2.28.1

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feat(compiler-rt): update compiler-rt source files

Update the compiler-rt source files to the tip of the llvm-project [1].
To do this some new header files were pulled in from the freebsd-src
repo [

feat(compiler-rt): update compiler-rt source files

Update the compiler-rt source files to the tip of the llvm-project [1].
To do this some new header files were pulled in from the freebsd-src
repo [2].

[1] https://github.com/llvm/llvm-project/commit/fae258e
[2] https://github.com/freebsd/freebsd-src/commit/243a0eda

Change-Id: I1a012b1fe04e127d35e208923877c98c5d999d00
Signed-off-by: Daniel Boulby <daniel.boulby@arm.com>

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